77840

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{139}}^1$

素因数の和:159

約数の個数: 40

約数和(自身を含む): 208320

約数和(自身を除く): 130480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 139, 140, 278, 280, 556, 560, 695, 973, 1112, 1390, 1946, 2224, 2780, 3892, 4865, 5560, 7784, 9730, 11120, 15568, 19460, 38920, 77840]

約数ペア:

[(1, 77840), (2, 38920), (4, 19460), (5, 15568), (7, 11120), (8, 9730), (10, 7784), (14, 5560), (16, 4865), (20, 3892), (28, 2780), (35, 2224), (40, 1946), (56, 1390), (70, 1112), (80, 973), (112, 695), (139, 560), (140, 556), (278, 280)]